--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/bin/boot_cycle.sh	Tue Sep 18 11:29:16 2012 -0700
@@ -0,0 +1,77 @@
+#!/bin/bash
+#
+# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+# The boot_cycle.sh script performs two complete image builds (no javadoc though....)
+# where the second build uses the first build as the boot jdk.
+#
+# This is useful to verify that the build is self hoisting and assists
+# in flushing out bugs. You can follow up with compare_objects.sh to check
+# that the two boot_cycle_?/images/j2sdk are identical. They should be.
+#
+# Usage:
+# Specify the configure arguments to boot_cycle.sh, for example:
+#
+#    sh common/bin/boot_cycle.sh --enable-debug --with-jvm-variants=server
+#
+# The same arguments will be used for both builds, except of course --with-boot-jdk
+# that will be adjusted to boot_cycle_1 for the second build.
+
+SCRIPT_DIR=`pwd`/`dirname $0`
+ROOT_DIR=`(cd $SCRIPT_DIR/../.. ; pwd)`
+BUILD_DIR=$ROOT_DIR/build
+mkdir -p $BUILD_DIR
+AUTOCONF_DIR=`(cd $SCRIPT_DIR/../autoconf ; pwd)`
+BOOT_CYCLE_1_DIR=$BUILD_DIR/boot_cycle_1
+BOOT_CYCLE_2_DIR=$BUILD_DIR/boot_cycle_2
+
+# Create the boot cycle dirs in the build directory.
+mkdir -p $BOOT_CYCLE_1_DIR
+mkdir -p $BOOT_CYCLE_2_DIR
+
+cd $BOOT_CYCLE_1_DIR
+# Configure!
+sh $AUTOCONF_DIR/configure "$@"
+# Now build!
+make images
+
+if ! test -x $BOOT_CYCLE_1_DIR/images/j2sdk-image/bin/java ; then
+    echo Failed to build the executable $BOOT_CYCLE_1_DIR/images/j2sdk-image/bin/java
+    exit 1
+fi
+
+cd $BOOT_CYCLE_2_DIR
+# Pickup the configure arguments, but drop any --with-boot-jdk=....
+# and add the correct --with-boot-jdk=...boot_cycle_1... at the end.
+ARGUMENTS="`cat $BOOT_CYCLE_1_DIR/configure-arguments|sed 's/--with-boot-jdk=[^ ]*//'` --with-boot-jdk=$BOOT_CYCLE_1_DIR/images/j2sdk-image"
+# Configure using these adjusted arguments.
+sh $AUTOCONF_DIR/configure $ARGUMENTS
+# Now build!
+make images
+
+if ! test -x $BOOT_CYCLE_2_DIR/images/j2sdk-image/bin/java ; then
+    echo Failed to build the final executable $BOOT_CYCLE_2_DIR/images/j2sdk-image/bin/java
+    exit 1
+fi
+
+